Prism glass octagonal lampshade



FIG. 1 is a top view of a prism glass octagonal lampshade showing my new design;

FIG. 2 is a left side view;

FIG. 3 is a front perspective view;

FIG. 4 is a bottom view; and,

FIG. 5 is a right side view.

The wall is shown in broken lines for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a prism glass octagonal lampshade, as shown and described. 